title: A novel magnetic Fe@Au core-shell nanoparticles anchored graphene oxide recyclable nanocatalyst for the reduction of nitrophenol compounds.
abstract: In this study, a novel catalyst based on Fe@Au bimetallic nanoparticles involved graphene oxide was prepared and characterized by transmission electron microscope (TEM), and x-ray photoelectron spectroscopy (XPS). The nanomaterial was used in catalytic reductions of 4-nitrophenol and 2-nitrophenol in the presence of sodium borohydride. The experimental parameters such as temperature, the dosage of catalyst and the concentration of sodium borohydride were studied. The rates of catalytic reduction of the nitrophenol compounds have been found as the sequence: 4-nitrophenol>2-nitrophenol. The kinetic and thermodynamic parameters of nitrophenol compounds were determined. Activation energies were found as 2.33 kcal mol(-1) and 3.16 kcal mol(-1) for 4-nitrophenol and 2-nitrophenol, respectively. The nanomaterial was separated from the product by using a magnet and recycled after the reduction of nitrophenol compounds. The recyclable of the nanocatalyst is economically significant in industry.
authors.affiliation: Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India. Electronic address: vinodfcy@iitr.ernet.in.
authors.forename: Vinod Kumar
authors.initials: VK
authors.lastname: Gupta
authors.forename: Necip
authors.initials: N
authors.lastname: Atar
authors.forename: Mehmet Lütfi
authors.initials: ML
authors.lastname: Yola
authors.forename: Zafer
authors.initials: Z
authors.lastname: Üstündağ
authors.forename: Lokman
authors.initials: L
authors.lastname: Uzun
mesh_terms: D002384:Catalysis; D006046:Gold / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D008280:Magnetics; D053768:Metal Nanoparticles; D046529:Microscopy, Electron, Transmission; D009596:Nitrophenols / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D013816:Thermodynamics
chemical_list: D009596:Nitrophenols; D010087:Oxides; D006046:Gold; D006108:Graphite; D007501:Iron
keywords: Bimetallic nanoparticle; Catalytic reduction; Characterization; Graphene oxide; Nitrophenol